List the name of the author or authoring organization, followed by a period. In this case, the name of the authoring organization is the American Psychological Association.
List the date the manual was published in parentheses, followed by a period. Make sure the period is outside the parentheses. In this case, the DSM IV was published in 1994.
List the title of the manual, followed by a period. Make sure that the title is underlined. Be sure to indicate that you are referring to the fourth edition. The title should appear in the following format:
Diagnostic and statistical manual of mental disorders (4th ed.).
List the place of publication, followed by a colon. In this case, the place of publication is Washington, D.C.
List the name of the publisher, followed by a period. In this case, the publisher is the same as the author (the APA), so the name of the publisher should simply be listed as "Author."